Granted Patent
Utility
US 5,927,403 · App. 08/837,574
Apparatus for increasing the flow of production stimulation fluids through a wellhead
Inventor:
L. Murray Dallas
Patented Case
View Patent ↗
Granted: Jul 27, 1999
Filed: Apr 21, 1997
Inventor
L. Murray Dallas
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.